Tuberculosis Pathogenesis Quiz
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Questions and Answers

What happens to the majority of droplet nuclei containing tubercle bacilli when inhaled?

  • They remain in the respiratory system without causing harm
  • They are immediately destroyed by the immune system
  • They are trapped in the upper airways and expelled out by the ciliary action of the mucosal cells (correct)
  • They travel directly to the lungs and infect the alveoli

    • What is the fate of the fraction of droplet nuclei containing tubercle bacilli that are not expelled by the ciliary action of the mucosal cells?

  • They are absorbed by the body and used for immune response
  • They may reach the lungs and cause infection (correct)
  • They are eliminated through sneezing and coughing
  • They are neutralized by antibodies in the upper airways

    • What is the primary mechanism by which droplet nuclei containing tubercle bacilli are expelled from the respiratory system?

  • Immune system response
  • Absorption by the lungs
  • Sneezing and coughing
  • Ciliary action of the mucosal cells (correct)

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